NED
XCM16K80SAT8 UME-0023-02
14
2.3 Optical Interface
For XCM16KSAT8, M72
×
0.75 screw mount is used.
The amount and wavelengths of light required to capture useful images
depend on the intended use. Factors include the property, speed, the object
’s
spectral characteristics, exposure time, the light source characteristics, the
specifications of the acquisition system and so on.
The exposure amount (exposure time x light amount) is the most important
factor in getting desirable images. Please determine the exposure amount
after studying what is most important to your system.
Keep these guidelines in mind when setting up your light source:
LED light sources are relatively inexpensive, provide a uniform field and
longer life span compared to other light sources. However, they also
require a camera with excellent sensitivity.
Halogen light sources generally provide very little blue relative to infrared
light (IR).
Fiber-optic light distribution systems generally transmit very little blue
light relative to IR.
Metal halide light sources are very bright but have a shorter life span
compared to other light sources.
Generally speaking, the brighter light sources, the shorter life span.
CMOS image sensors are sensitive to infrared (IR). We recommend using
daylight color fluorescent lamps that have low IR emissions. If you use a
halogen light source, to prevent infrared from distorting the images use an IR
cutoff filter that does not transmit IR wavelengths.
